Controlling system for motor-driven clocks



Aug. 14, 192s. 1;'6sog686 s. Kr-:lLn-:N i CIONTROLLING SYSTEM FOR MOTOR DRD/ EN CLOCKS Filed sept. 14, 1925 2 'sheets-sheet 1 Illlllmlllmnnmmmummmmn vwamcoz W Sauf Kei Hen 351g@ @MSCI/14013 f Aug. 14, 1928. 1,680,686 s. KEILIEN CONTROLLING SYSTEM FOR MOTOR DRIVEN CLOCKS Filed sept.14, 1925 2 sheets-*sheet 2 Nzo Patented Apg. 14, 1928.

UNITEDLSTATES PATNT oFFlcsf L SAUL KEILIEN, 0F BINGHAMTON, NEW YORK, ASSIGNOR T0 yINTERNATIONAL TIME RECORDING COMPANY OF NEW YORK, 0F ENDICOTT, NEW YORK, A CORPORATION OF NEW YORK.

' l coNrRoLLING systeem ron Moron-DRIVEN cLocxs.-

f Application tuea september 14, 1925. serial No. 56,107.

lThis invention relates to the operation of a secondary clock and. more yparticularly to the operation of a 'heavy duty secondary It is proposed to use the subject matter of my invention to control the operation of large secondary clocks such as are used in rotundas large auditoriums, railroad stations and in any place where large and conspicuous clocks are necessary. The hands of such clocks are usually heavy, depending uopn the size of the dial; and they should accordin ly be moved by a strong propelling force suc as a motor. n order to minimize the operating costs of these clocks, it is desirable not to keep the driving motor running continudusly and it is an aim of my 1nvention to provi a motor operating circuit which will be rendered effective to operate the motor at regular intervals by a vlow powered controlling circuit controlledpby a master clock, and which automatically will be rendered ineffective to further advance the secondary clock when the secondary clock has been advanced a definite distance.

In the embodiment of my invention which y I am about to describe, the starting impulse sent out over the controlling circuitl byy the master clock occurs periodically every minute, andthe motor is run thereafter only so long as it is necessary to' advance the hands of the secondary clock over the face of the clock a distance corresponding to one minute. This period of motor. operation is dependent upon the gearing ratios existing between the motor and the hands as well as upon the speed of the motor. n

It is among the objects of this invention to provide a sim le electrical system for causing the actuation `of a secondary clock or a plurality/of secondary clocks, each of which is under the'control of a master clock, and which will cause the actuation of each secondary clock a't minute intervals, the duration of operation of each secondary clock driving motor extending over a short period of time.

Another object resides in providing a secondary motor operating circuit adapted to be closed for a minimum eriod of time to cause the advance of the ands of a large or heavy duty secondary clock by the operation of a motor.

.Other objects and uses of the invention will appear from a detailed description of the same, whichY consists in the features of constructions and ycombinations ofelements hereinafter described and claimed.v y

,In the drawings:

Fig. 1 is an elevational view of a secondary` clock as seen from the left.

ig. 2 is a rear elevation of the secondary clock. f Fig. 3 is a sectional view showing the relation of the motor and its driven shaft to the minute arbor. n

Fig. 4t is aplan view of the contactsY for terminating the advance -of the secondary clock.

Fig. 5 is a wiring diagram.

Referring to Fig. 5, the reference numeral 10 designates Ithe controlling circuit which has asuitable source of current such as a battery, and includes a relay coil 11 and contacts 12. These contacts are adapted to be closed each minute for a period of a few seconds so as to energize relay coil 11 to cause armature 13 to contact with point 14. The contacts arefmounted on two levers of different length which rest on the periphery of cam 15, secured to the minute arbor of the master clock.

Upon the energization o f relay-coil complete circuit will Abe made from main line 16 through armature 13. point 14, line 17, where the current branches, some of it going through lines 18, 19, motor 20 and through the ground to main line 21 whilethe remainder of it goes through line 22. and electro-magnet 23. The energization of el'ectrofmagnet 23 attracts armature I24t to contact with point 25. The passage of current through the motor causes the. motor to operate and start the advance of the hands of the secondary ffclock, and, through gearing which will be described hereinafter,

cause the rotation of control shaft 26.

depression in which they were left at the time the shaft had stopped revolving on the stoppage of the motor at the conclusion of the previous advance of the hands. The raising of the blades closes contacts 29-29 and a circuit will be made from main line 16 through line 30, contacts 29, line 31, point 25, armature 24, line 32, line 19, to motor 2O and back through the ground to main line 21. Some of the current flowing through armature 24 and line 32 divides and flows through line 18, line 22, electro-magnet 23, thence through the ground to main line 21. This latter circuit 16 through 32 and branches, continues to conduct current even though minute arbor contacts 12 of the master clock have been opened and armature 13 has been released. The result is that motor 20 continues to advance the hands of the secondary clock and shaft 26 until shaft 26 has been turned enough to allow blades 28-28 to drop ofi' of the next succeeding projections on cams 27-27 thus breaking contacts 29-29. The breaking of contacts 29-29 occurs just as the minute hand has advanced to indicate the minute of time. The cycle of operation and current iow just described will repeat itself again upon the next closing operation of the master clock controlling circuit by the contacts 12, and will be repeated indefinitely at minute intervals.

One contact 29 could be used, but in the drawing two are shown and such an arrangef ment insures the proper timing of the making and breaking of the operating circuit as well as a means of adjustment.

The relays and the motor must be adapted to operate on either a direct current or alternating current system, as the case may be, and it is evident that the controlling circuit of the master clock could receive its current lfrom the main lines if such would be convenient. However, the wiring plan has been illustrated to disclose the various circuits at a glance, and the use of a battery and of ground connections has, this object in view.

Referring more particularly to the secondary clock structure, the motor 20 is mounted on and secured to a plate 33, disposed bctween front and rear plates, 34 and 35, respectively, directly to the rear of clock dial 36. To the rotor shaft'37 there is secured a Worm 38 which meshes with a worm gear 39 carried by shaft 40 journalled in casting 41. The rear end of shaft 40 carries a pin which engages radial slots in shaft 42 whose rear end is journalled in plate 54. A pinion 43 on shaft 42 engages gear 44 rotatively mounted on a stub shaft which eX- tends forwardly from plate 3. Pinion 45 turns with gear 44 and drives cam shaft 26 through gear 46.

To the rear end of cam shaft 26 is secured a pinion 47 which engages and drives gear 48 fast to the minute hand arbor 49. This arbor is journalled in bearings in front and rear plates 34 and 35 and extends through the dial. J ust in front of the front plate, the usual twelve to one reduction gearing is mounted and sleeve 50 is rotated thereby one twelfth of'the angular travel of arbor 49. Blades 28, 28 are mounted on afbracket 51 which is secured to the front plate, as is also a hood 52, designed to cover and protect the mechanism of the secondary clock from dirt and interference.

The particular design of secondary clock described is not essential to the operation or use of the controlling system, in which I contemplate alterations and changes within the scope of the appended claims as may be found to be advisable.

What I claim is:

1. A secondary clock operating system comprising, in combination, a controlling circuit, a motor, a circuit for starting said motor, a third circuit for operating said motor, and contacts controlled by said motor for terminating the operation of said motor after a predetermined duration of operation of said motor.

2. A secondary clock operating system comprising, in combination, a controlling circuit, a motor, a second circuit for starting said motor, a relay in said circuit adapted to be actuated by said controlling circuit to close said second circuit and a motor operating circuitA adapted to be closed concomitantly with the closing of said second circuit.

3. A secondary clock operating system comprising, in combination, a controlling circuit, a motor, a second circuit for starting said motor, a relay in said circuit adapted to be actuated by said controlling circuit to close said second circuit, a motor operating circuit' adapted to be closed concomitantly with the closing of said second circuit, and

Icontacts'in said motor operating circuit for automatically opening said circuit.

l 4. A secondary clock operating system comprising, in combination, a controlling circuit, contacts in said circuit for periodically closing and opening said circuit, a motor, a motor starting circuit adapted to be closed and opened by said first named circuit,1a third circuit for operating said motor while said first and second' named circuits are open, and a relaycontrolled by said second named circuit for closing said third circuit.

5. A secondary clock operating system comprising, in combination, a controlling circuit, contacts in said circuit for periodically rclosing and opening said circuit, a motor, amotor starting circuit adapted to be closed and opened by said first named circuit, a third circuit for operating said motor While said second named circuit is open, and a relay adapted to close said third circuit and maintain it closed.

6. A secondary clock operating System comprising, in combination, a controlling circuit, contacts in said circuit for periodically closing and opening said circuit,.al

' motor, a motor starting circuit adapted to be closed and opened by said rst named circuit, a third circuit for operating said motor While said second named circuit is open, a relay adapted to close said third circuit, and contacts controlled by said motor for opening said third circuit.

7. In a system for operating secondary clocks, the combination comprising a controlling circuit, contacts controlled by. a master clock for causing intermittent excitation of said circuit, a second circuit controlled by said first named circuit, a motor controlled by said second named circuit, a third circuit for continuing the operation of said motor When said second circuit is opened, means driven by said motor foractuating the hands of a secondary clock, and contacts for shutting off the operation of said motor after the hands have advanced a predetermined distance.

In testimony whereof I hereunto aiiix my signature.

SAUL KEILIEN. 

